Tack-pulling machine.



L B. HADAWAY TACK PULLING MACHINE.

APPLICATION FILED APR.5. 191s.

Pzitented Aug. 20, 1918.

3 SHEE-TSSHEET I.

S I g Qmlqiw m 1 2m my J. B. HADAWAY.

TACK PULLING MACHINE. APPLICATION FILED APR. 5 1916.

Patented Aug. 20, 1918.

3 SHEETS-SHEET 2.

Patenied Augi'20, 1918.

3 SHEETS-SHEET 3 lwawk J. B. HADAWAY, TACK PULLING MACHINE.

APPLICATION FILED APR.5.1916.

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UNITED STATES PATENT OFFICE.

JOHN B. HADAWAY, OF SWAMPSCOTT, MASSACHUSETTS, ASSIGNOR, BY MESNE ASSIGN- MENTS, T UNITED SHOE MACHINERY CORPORATION, OF PATERSON, NEW JERSEY, A. CORPORATION OF NEW JERSEY.

TACK-PULLING MACHINE.

' 7 Specification of Letters Patent. Patented A11 20, 1918.

Application filed April 5, 1916. Serial No. 89,156.

To all whom it may concern: ends upon a rocker arm. The levers are Be it known that 1, JOHN B. HADAWAY, actuated to impart the proper movements to a citizen of the United States, residing at the jaws by mechanism connected with the Swampscott, in the county of Essex and opposite encs of the levers and arranged to 5 State of Massachusetts,.have invented cer oscillate the rocker arm to move the levers tain new and useful Improvements in Tack ina lengthwise direction and to oscillate the Pulling Machines; and I do hereby declare levers about the rocker arm to move the jaws the following to be a. full, clear, and exact toward and from one another. In order to description of the invention, such as will cause the two jaws to move in paths of dif- 10 enable others skilled in the art to which it ferent lengths the levers are supported upon appertains to make and use the same. the rocker arm at different distances from The present lnvention relates to tack pullthe center of oscillation of the arm. In the ing machines and more particularly to masimplest and most efficientform of the inchines for removing side tacks from lasted vention which hasyet been devised one of 15 boots or shoes, the jaw supporting levers is fulcrumed upon The object of the present invention is to an eccentric head secured to the end of a provide an improved form of tack pulling rock shaft, and the second lever is fulcrumed machine having a simple and compact conupon a crank arm located at one side of struction and which engages and removes the eccentric head. The arrangement of the 20 side tacks with certainty and rapidity. eccentric head and crank arm is such that With this object in view a feature of the the centers about which the levers fulcrum invention consists in the combination of a and the center of oscillation of the rock shaft pair of levers, a tack pulling jaw secured to are permanently in alinement so that this the end of each lever, a rocker arm supportconstruction forms a practical embodiment- 25 ing both levers between their ends, a conof a single rocker arm for supporting the tinuously rotated shaft, and connect ons belevers. tween the shaft and opposite ends of the The tack pulling machine shown in the levers for oscillating the rocker arm to move illustrated embod' nent of the invention the jaws forward and from a shoe and for comprises cooperating tack pulling jaws in B0 oscillating the levers about the rocker arm dicated at 1 and 2 which are mounted upon to move the jaws toward and from one anthe outer ends of supporting levers l and 5, other. respectively. The jaw carrying levers are Further features of the invention consist supported between their ends by a rock shaftin certain novel features of construction, 7 journaled in a transverse bearing formed 35 combinations and arrangements of parts in the machine frame, as shown clearly in hereinafter described and claimed, the ad- Fig. 2. The jaw carrying lever 5 1S fulvantages of which will be obvious to those crumed upon an eccentric head 8 formed skilled in the art from the following deintegrally with the shaft 7 and the jaw car.- scription. rying lever 4;. is fulcrumed at one side of the 40 In the accompanying drawings illustratlever 5 upon a crank pin 9 secured to a crank ing the preferred form of the invention; arm 10 formed integrally with the face of Figure 1 represents a side elevation of the the eccentric head 8, as shown in Fig. 2. improved tack pulling machine with the It will be obvious to those skilled in the art upper guard inclosing the tack pulling jaws that this construction is the equivalent of a 5 removed; Fig. 2. is a top plan view of the single crank with the levers fulcrumed theremechanism shown int/Fig. 1; Fig. 3 repreon at different distances from the axis of sents a side elevation of the tack pulling the shaft? forming eflective crank arms of machine as a whole with the inclosing different lengths. Owing to the fact that guards in place; and Fig. a is a detail upon the lever carrying the upper jaw 1, as shown 5 an enlarged scale illustrating the tack pullclearly in Fig. t, is supported upon a crank ing jaws and cooperating worksupports. arm of greater length than the lever carry In thepresent invention two cooperating ing the lower jaw 2, the extent of movement tack pulling jaws are mountedupon the-ends of the upper j aw toward and from the shoe of'a pair of levers fulcrumed between their is greater than the extent of movement of the lower jaw, causing the jaws to move in )aths as shown in F i 41-. The shaft 7 is retained in position after the levers are assembled thereon by a collar 12 clamped to the opposite end of the shaft, as shown clearly in Fig. 2. The crank arm 10 serves toretain the lever 5 in position upon the eccentric 8 and the lever 4 is retained in position upon the crank pin 9 by a disk 13 and stud 14, secured to the crank pin.

In addition to a bodily movement of the jaws toward and from the shoe the jaw carrying levers are also oscillated about the fulcra to move the jaws toward and from one another. its rear end to a crank 15 of suitable length secured to one end of a continuously rotating drive shaft 16. The driving crank 15 serves the dual function of oscillating the lever at to move the jaw 1 toward and from the jaw 2 and of rocking the shaft 7 to impart a bodily in and out movement of both jaws with relation to the shoe. The lever 5 carrying the jaw 2 is oscillated by a rotary cam secured to the shaft 16 and provided with two peripheral cam surfaces 17 and 18 which are engaged respectively by the parallel guide faces 19 and 20 formed upon the bifurcated end of the lever 5. This construction forms a simple and eflicient mechanism for imparting the proper oscillatory movements to the lever 5 while permitting lengthwise movements of the lever relative to .the cam. A tack receiving chute is located beneath the jaws and it is desirable to release the tack and merely drop it into the receiving chute rather than to forcibly eject the tack from between the jaws. To this end the jaws are actuated in such a manner that the paths separate slightly after the tack has been engaged and substantially removed from the shoe and prior to the relative movement of the jaws to eject the tack. This releases the tack and permits it to be easily disengaged when the upper jaw is moved beyond the lower jaw. The paths in which the two aws move are clearly shown in Fig. l and the separation of the jaws is conveniently accomplished in the present construction by imparting a slight oscillatory movement to the lever 5 through the rotary actuating cam prior to the complete separation of the jaws. Each jaw has provision for adjustment in two directions with relation to the respective jaw carrying lever and to this end the jaw 1 is connected to the ends of the lever 4 through bolt and slot connections 21 and 22 and the jaw2 is connected to the lever 5 through bolt and slot connections 23 and 2 1.

It is customary in this type of machine to provide cooperating work supports which engage with the lasted shoe upon opposite.

sides of the tack to be removed and with a fixed abutment extending The lever at is connected at transversely of.

the lasted upper outside of the line of tacks.

In addition, a work support 28 engages with the shoe inside of the line of tacks and the two work supports 26 and 28 form throat 'the usual manner forguiding the tacks to the tack pulling jaws. The tack is positioned in the plane of the tack pulling movement by an abutment 27 extending transversely of the line of tacks in the usual manner. It is desirable that the work support 28 shall be positioned in close proximity to the path of movement of the tack pulling jaws and in order to avoid injury to the machine ifa jaw accidentally contacts with the work support the latter is arranged to yield outwardly away from the path of movement of the jaws. To this end the work support 28 is secured to a curved arm 30 pivoted upon the frame at 31 and extending outwardly and downwardly from the fulcrum, as shown clearly in Fig. 1. The arm 30 is fulcrumed upon a head 32 having a face 33 which engages with the under side of the arm to limit the downward movement. The arm is normally depressed by a coil spring 35 surrounding a stud 36 upon which the arm is pivoted and connected at its opposite end to a pin 87 extending from the head 32, as shown clearly in Fig. 2. The work support is adjustably connected to the lower end of the arm through a bolt and slot connection indicated at 10. This construction permits the work support to move outwardly away from the path of movement of the jaws and at the same time owing to the location of the fulcrum, imparts an upward movement to the work support. This feature is of decided advantage as the operator is enabled to vary the position of the work support by the upward pressure of the shoe. This movement of the work support simultaneously widens the tack guiding throat and permits the movement of the shoe bottom to ward the path of movement of the tack pulling jaws, the shoe pivoting about the outer work support 26 as the work support 28 is moved outwardly and upwardly.

1V hile it is preferred to employ the specific construction and arrangement of parts shown and described, it will be understood that this construction and arrangement is not essential except so far as specified in the claims, and may be changed or modified without departing from the broader features of the invention. I

The invention having been described, What is claimed is 1. A tack pulling machine, having in c0mbination, a pair of levers, a tack pulling jaw secured to the end of each lever, a rocker arm supporting both levers between their ends, a continuously rotated shaft, and connections between the shaft and the opposite ends of the levers for oscillating the rocker arm to move the jaws toward and from a shoe and for oscillating the levers about the rocker arm to move the jaws toward and from one another.

2. A tack pulling machine, having in combination, cooperating tack pulling jaws, a lever supporting each jaw, a rock shaft, a rocker arm projecting from the shaft and supporting the levers between their ends at different distances from the axis of the shaft, and mechanism for oscillating the levers about the rocker arm.

3. A tack pulling machine, having in combination, a pair of cooperating tack pulling jaws, a lever supporting each jaw, a rock shaft, a rocker arm projecting from the shaft and supporting the levers between the ends, a driving crank operatively connected to the end of one of the levers, and a rotary cam operatively connected to the end of the second lever.

4s. A tack pulling machine, having in combination, a pair of levers, a tack pulling jaw secured to the end of each lever, a rocker arm supporting both levers between their ends, and mechanism for actuating the rocker arm to move the jaws toward and from a shoe and for oscillating the levers about the rocker arm to open and close the jaws.

5. A tack pulling machine, having in combination, a pair of levers, a tack pulling aw secured to the end of each lever, a rocker arm supporting both levers between their ends, a driving crank connected to the op: posite end of one of the levers for oscillating the lever about the rocker arm and for moving the lever in a lengthwise direction, and a rotary cam operatively connected to the second lever for oscillating the lever.

6. A tack pulling machine, having in combination, a pair of cooperating tack pulling jaws, and actuating mechanism constructed and arranged to first impart a movement of separation to the jaws during the tack pulling movement sufficient to relieve the pressure upon the tack and to next move the jaws relative to one another in the direction of the tack pulling movement after the pressure upon the tack has been relieved to disengage the tack from between the jaws.

7. A tack pulling machine, comprising, a tack pulling jaw, mechanism for actuating the jaw, a work support engaging with the upper of the shoe outside of the line of tacks,

, a second work support engaging with the shoe inside of the line of tacks, and means for permitting the second support to yield laterally away from the path of the tack pulling aw.

8. A tack pulling machine, comprising, a tack pulling jaw, mechanism for actuating the jaw to engage and pull a tack, cooperating work supports engaging upon opposite sides of the line of tacks, a fixed abutment extending transversely of the line of tacks, and mechanism for permitting one of the work supports to yield upwardly.

9. A tack pulling machine, comprising, a tack pulling jaw, mechanism for actuating the jaw to engage and pull a tack, and cooperating work supports engaging with the shoe upon opposite sides of the line of lasting tacks, one of the supports having provision for a yielding movement to simultane ously move the support upwardly and away from the path of the tack pulling jaw.

10. A tack pulling machine, comprising a combination, a pair of cooperating tack pulling jaws, and actuating mechanism constructed and arranged to first move the jaws to grip and pull the tack, to next move the jaws to relieve the pressure upon the tack, and to finally move the jaws to discharge the tack whereby the tack discharging movement of the jaws takes place after the pressure upon the tack has been relieved.

JOHN B. HADAWAY.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents; walhlnxton, D. 0; 

